This is NOT my story all credits go to dolce_piccante on ao3 - In the grand scheme of things, finding a date for a wedding should be no problem for Louis Tomlinson. He's rich. He's handsome. He's reasonably well behaved. But when the wedding is for his lifelong best friend (and former boyfriend), and is happening in under a month, finding a date for the ceremony and accompanying festivities becomes more of an adventure than he ever could have planned for. - https://archiveofourown.org/works/4034197/chapters/9071932

"I will kill you in your sleep," Louis threatened as he quickly stepped out of his jeans. "I don't think that would work very well baby, seeing as you talk to dead people all the time." "I'll kill you in your sleep and ignore your ghost. And don't call me that." (Louis and Harry are psychics who kind of hate each other. They go to Tennessee to investigate a haunting.)

The one where in his travels to find Swan's elusive treasure, Captain Louis Tomlinson of the Black Dagger discovers he has a stowaway onboard-a stowaway who is rather tall and pretty and pouty, and can spout off Shakespearean poetry as though he had written it. A stowaway who is also, unfortunately, secretly Louis' biggest threat. Captain Harry Styles.